[GRASS-user] problem with g.in.ogr

[Markus Metz]

On Wed, Apr 18, 2018 at 5:39 PM, Camille Bezzina <camille.bezzina at geophom.fr>
wrote:
>
> You can download the shapefile causing problems here :
https://we.tl/qByZnpMNvU
>
Thanks a lot!

The input is 3D, and pairs of consecutive vertices are exactly on top of
each other. The data can be imported successfully with v.in.ogr -2, forcing
2D output.

In this case I don't understand (yet) why forcing 2D is necessary.

Markus M

>
> Le 18/04/2018 à 17:30, Markus Metz a écrit :
>
>
>
> On Wed, Apr 18, 2018 at 5:27 PM, Camille Bezzina <
camille.bezzina at geophom.fr> wrote:
> >
> > Hi,
> >
> > I tried to import my vector with the latest version 7.4 and testing
snap=0.01or other values but there is always the same problem.
> >
> > I also tried with another shapefile (smaller) but it doen't change
anything.
> >
> > You can find the result in the attached file (verbose + .pdf). As you
can see, when I import a .shp, a lot of polygons desappear.
>
> Can you provide off-list (a link to) the shapefile causing problems? Then
we can test.
>
> Markus M
>
> >
> > Camille
> >
> >
> > Le 12/04/2018 à 18:20, Moritz Lennert a écrit :
> >
> > On 12/04/18 17:03, Camille Bezzina wrote:
> >
> > Hi Markus,
> >
> > In the file attached you can find the full output of v.import with
verbose.
> >
> > I launch this one with v.in.ogr and this is the answer.
> >
> >
> > At the end you can see:
> >
> > "Some input polygons are overlapping each other.
> > If overlapping is not desired, the data need to be cleaned.
> > The input could be cleaned by snapping vertices to each other.
> > Estimated range of snapping threshold: [1e-08, 1]
> > Try to import again, snapping with at least 1e-08: 'snap=1e-08'"
> >
> > Try importing with snap=0.01 or something like that (depending on the
nature and precision of your data.
> >
> > Moritz
> >
> >
> > Thanks.
> >
> >
> >
> > Le 12/04/2018 à 16:39, Markus Metz a écrit :
> >
> >
> >
> > On Thu, Apr 12, 2018 at 3:04 PM, Camille Bezzina <
camille.bezzina at geophom.fr <mailto:camille.bezzina at geophom.fr>> wrote:
> > >
> > > Hello all,
> > >
> > > I have a problem with v.in.ogr.
> > > I would like to import a shape file (with 57851 polygons) with
v.in.ogr.
> > >
> > > v.import --verbose
input=/media/hdd1/phom/eolien/AIP_UNESCO_RONCHAMP/data/qgis/MNE/bati_D90_decoupe.shp
layer=bati_D90_decoupe output=bati_D90_decoupe -o
> > >
> > > Visibly the order is going well, my attribute table contains 57851
attributes but when I check my vector with display, some polygons are
missing.
> >
> > Can you post the full output of v.import with --verbose?
> >
> > Considering that you override the projection check with -o, you can
also use v.in.ogr directly and then post the full output of v.in.ogr -o
--verbose.
> >
> > Markus M
> >
> > >
> > > Thanks for your help.
> > >
> > > --
> > > Camille Bezzina
> > > Geophom
> > > _______________________________________________
> > > grass-user mailing list
> > > grass-user at lists.osgeo.org <mailto:grass-user at lists.osgeo.org>
> > > https://lists.osgeo.org/mailman/listinfo/grass-user
> >
> >
> > --
> > Camille BEZZINA
> > Chargé d'études géomatiques et photomontages
> > Geophom
> > 57 rue du Chemin Neuf 44521 OUDON
> > Standard: +33(0)2 85 52 02 59
> > Ligne directe: +33(0)9 72 56 81 71
> > www.geophom.fr
> >
> >
> > _______________________________________________
> > grass-user mailing list
> > grass-user at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/grass-user
> >
> >
> >
> >
> > --
> > Camille BEZZINA
> > Chargé d'études géomatiques et photomontages
> > Geophom
> > 57 rue du Chemin Neuf 44521 OUDON
> > Standard: +33(0)2 85 52 02 59
> > Ligne directe: +33(0)9 72 56 81 71
> > www.geophom.fr
>
>
> --
> Camille BEZZINA
> Chargé d'études géomatiques et photomontages
> Geophom
> 57 rue du Chemin Neuf 44521 OUDON
> Standard: +33(0)2 85 52 02 59
> Ligne directe: +33(0)9 72 56 81 71
> www.geophom.fr
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